Scilab Function
Last update : 18/11/2005

TCL_UnsetVar - Remove a tcl variable

### Calling Sequence

  `OK=TCL_UnsetVar(varname [,interp])`

### Parameters

- `varname`: character string. Contains the name of the tcl/tk variable to unset.
- `interp`: optional character string parameter. Name of the slave tcl interpreter in which the operation has to be performed. If not provided, it defaults to the main tcl interpreter created by Scilab.
- `ok`: boolean. %T if varname was deleted.

### Description

This routine allows to unset a tcl variable.

### Examples

    TCL_SetVar("Scilab","OK")
    TCL_GetVar("Scilab")
    TCL_UnsetVar("Scilab")
    TCL_ExistVar("Scilab")

    TCL_CreateSlave('InterpSlave');
    TCL_SetVar("Scilab","Good",'InterpSlave')
    TCL_GetVar("Scilab",'InterpSlave')
    TCL_UnsetVar("Scilab",'InterpSlave')
    TCL_ExistVar("Scilab",'InterpSlave')
    TCL_DeleteInterp('InterpSlave')

### See Also

`ScilabEval`, `TCL_EvalFile`, `TCL_EvalStr`, `TCL_GetVar`, `TCL_SetVar`, `TCL_ExistVar`, `TCL_UpVar`, `TCL_CreateSlave`, `TCL_DeleteInterp`,

### Author

Allan CORNET